SSID and other WLAN settings can be made device-unique using User-Defined Overrides. These must be set from cnMaestro though and are not learned from the device. The below Knowledge Base article details how to do this with examples for SSID and Password.
We are taking feedback for parameters that should be added as built-in overrides. Please see the below thread and post a reply if there are items you think are missing from the list.